PDF malware analysis — malicious · a13fb4ba24d61648

MALICIOUS

PDF

3.8 KB

MD5: d6cc2944c302ed7c05cb6b3673a9dce4 SHA-1: 81b141e14a0f5d6c32db59cff54753d21bd11b20 SHA-256: a13fb4ba24d61648bac3655c5d413e241ac5f70e86d8cc05b708a2120c3e8822

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2014-0496 vulnerability. The script uses eval() and String.fromCharCode to decode and execute a secondary payload. This indicates a malicious document designed to exploit a known vulnerability for initial code execution.

Heuristics 7

app.addToolButton/removeToolButton — CVE-2014-0496 critical CVE exact CVE_2014_0496

PDF JavaScript combines app.addToolButton() and app.removeToolButton() with heap-spray shellcode markers — the public Adobe Reader/Acrobat ToolButton use-after-free exploit shape for CVE-2014-0496. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `dc6bf94978cc910707c28414e1ea10baa46bfebf794f30df6022ad099e77ee22`	pdf-javascript-stream	PDF /JS object 6 at offset 0x224	19216 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_000_off0000012f.bin` `69d0d0114b03e3f7748b6bbd5809c83dc8d156e20d1bfcdf9d5925fb9a502f54`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x12F	372 bytes
`numeric_charcode_stage_000.js` `d4c0abc4d1c40d1f115c04fae08972053dc150e10a42db3154d133274c2ba73d`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x232	5682 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 13 eval/decoder/string-building token(s).

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